Oil burner



Nov. 15, 1927. 1,648,923

C. F. WARRICK OILA BURNER y Filed Qct. 6 1924 2 Sheets-Sheet l m Sggx Nov. 15, 1927. 1,648,923

c. F. WARRICK OIL BURNER Filed Det.. 6, 1924 2 Sheets-Sheet 2 Patented Nov. l5, 1927. l

UNITED STATES PATENT OFFICE'. y

CHARLES F. WARRIOR, DETROIT, MICHIGAN, -ASSIGNOR T0 PENBERTHY INJEGTOR' VCOMPANY, 0F DETROIT, MICHIGAN, A.' CORPORATION OF MICHIGAN. y

oIL nomina.

Application filed October 8, 1924. Serial No. 741,980.

The invention relates to oil burners of the centrifugal type and consists in certain no vel features of construction which are hereinafter morefully'described. l

One of the objects of the inventionis to provide a safety device for automatically cutting 0E' the oil supply to the burner head in case the latter fails to rotate for any reason. For this purpose I have provided the centrifugal nozzle with a cup-shapedreservoir normally receiving the oil distributed to the burner and provided with an overow conduit at the inner' periphery thereof adapted to drain away any surplus oil collecting in the reservoir.` When the nozzle is rotating normally the centrifugal force acting upon the oil in the reservoir throws the same outwardly towards the outer peripheral wall thereby preventing the accumulation of a sufficient supply to drain od through the drain conduit. If, however, the nozzle ceases to rotate the oil will immediately collect in the nozzle until the level rises to the opening of the drain conduit. Suitable means are also .provided lfor collecting the oil from the drain conduit and actuating a shut-olf valve for the oil supp I:llinother object of the invention is to p rovide an improved atomizing nozzle having means for distributing the oil in a very thin film whereby it will leave the burner in a hnely atomized condition. For this pur., pose l provide a nozzle with a cup portion having substantially cylindrical walls and a flaring portion having aconical surface con necting with the cylindrical walls.

` @their objects willv be more apparent after considering the detailed description hereinafter given in connection with the accompanying drawings wherein z 0- Figure 1 is a sectional' view of the 1m proved oil burner;

Figure 2 is a transverse section on the line 2 2 of Figure 1;

Figure 3 is a diagrammatic view showing the burner in elevation and an apparatus for shutting oli` thefuel line by-collect-ing the overflow oil from the burner.

The burner comprises an annular supporting base 1 having a laterally extending pro-l jection 2 adapted to support at the outer end an electric motor 3. 4 is the main housing suitably supported upon the base 1 and providedwith the laterally extending housing 5, in axial alignment with the motor 3. Within the main housing there is a central stationary standard 6 having an oil passageway-'fZ-*therethrough adapted to carry the oil from the inlet opening 8 in the lower .part of the housing to a distributing head 9 at the upper end of the standard, this head being provided with the radial passages 10. 11 is a sleeve or hollow shaft surrounding the standard 6 and rotatably mounted by the bearings 12 in the housing 4. 'This sleeve is driven by the bevel pinion.13 meshing with* the bevel gear 14, thelatter being mounted on a transverse shaft 15 which is rotatably mounted by the bearings 16 in the housing 5. The shaft 15 is connected to `the motor 8 by an intermediate shaft 17 and suitable coupling vconnections 18.

The upper end of the main housing 4- is provided with an annular pan 19, while above the same is located a burner pan 20 having inner cylindrical walls 21. The nozzle 22 is secured to the rotatable sleeve 11. and extends upward through the burner pan 20 and` is provided withsuitable varies `23 for olirectin the air supply adjacent the discharge point of the nozzle.

rlhe nozzle comprises a cylindrical por tion 24 surrounding the oil distributing head 9 and terminating at its upper end in the haring annular Wall 25 having a conical surface 26. The nozzle is also provided with an inner cylindrical wall 27 spaced from the cylindrical outer wall 2li and forming an annularprecess 28 therebetween adapted to receive and. collect the oil from the burner head. 29 is a tubular member inwardly spaced from the inner wall g27fand risingabove @the same to a oint adjacent the distributing head 9. T is member forms the annular discharge conduit 30 for any surplus oil rising above the top of the inner wall 27. Oil which collects in the conduit 30 passes by gravity into the annular pocket 8l from whence it is directed through the dis- 10e charge passageway 32 in the downwardly ex,- tending flange 33 of the nozzle, this dange vpreferably extending'into the annular pan through the distributing head 9 into the cy- -tionary standard 6 is distributed radially v lindrical portion 24. of the rotating nozzle. 11.0

Thenozzle is rotated by'rmeans of the electric motor 3 and the centrifugal force therefore distributes the oil along the cylindrical surface 24 into a thin film, the centrifugal force being lsuliicient to cause-the film to iow upward against'the action of gravity until it reaches the ilaring portion 25 of the nozzle. At this point the lilm of Oil-is distributed outward to the periphery ofthe flange where it is thrown outwardly 1n a nely atomized condition. The air 1s delivered by means of the rotating vanes 23 to the under side of the oil spray, thereby forming 'a combustible mixture adapted to be com letely burned.

. Ifpfor any reason the burner ceases to be rotated, such as the breakage of the driving parts, the oil will no longer be distributed upward in the cylindrical portion of the nozzle and will collect in the annular pocket 28 and as soon as the level reaches the top Vof the inner wall 27 the oil will overflow through the annular -discharge conduit 30 andthe passages 33 collecting in the `stationary oil pan 19. y

In'Figure 3 I have represented a method forshutting ofthe oil supply whenever the, centrifugal force does not deliver the same from the nozzle, this lcomprising a drain pipe 34 leading from the stationary annular pan 19 to a bucket 35. The latter is normally held byl a spring 36 in its upper po-v sition but is adapted to move to lower position when a predetermined amount of oil is collected therein. The movement of the buckety may be arranged. in any suitable manner to close the valve 37 in the supply conduit 38, such for example, as by providing a lever 39 fu'lcrumed at a xed support 40 and secured to the lower end of the spring 36, the outer vend of the lever being connected to the rod 41 attached to the valve 37. It will be understood of course, that this is merely a diagrammatic illustration of an automatic shut-oli' connection since appa-4 ratus of this character is old in the art.

The burner is, also provided with means yfor draining unburned oil from the furnace into the annular oil pan 19 so that in case the atomizing nozzle should feed oil with the burner unlighted the shut-o valve will be loperated to cut 'oft' the Oil supply to the burner. For this purpose the walls of the fire pot 44 are inclined so that the oil strik- `ing the samewill drain into -the annular burner pan 20, the latter being preferably filled with re clay as indicated at 45. The inner wall'of the burner pan is provided with an aperture 46 communicating with` a vertical drain passageway 47 which, in turn is arranged directl above the' oil pan. 19. Thus, any oil whic drains off the walls 44 will overflow through the aperture 46 and passageway 47. and will collect in the oil pan 19 where it wlll operatethe automatic shut downwardly projectingl oft connection in the Vsame manner as previously described.

What I claim as my invention is 1. In an oil burner, the combination of a rotary atomizing nozzle having an annular recess, means for delivering oil into, said recess, a member spacedI radially inward from nozzle comprising spaced inner and outer walls forming an annular recess therebetween, a conduit communicating with said recess, a collecting chamber connected with said conduit, said rotary nozzle producing centrifugal force, thereby preventing the oil from reaching said conduit when said nozzle is rotating and gravitational force permitting the same when said nozzle is stationary.

3. In an oil burner, the combination with a stationary supply pipe and a rotatable sleeve surrounding the same, of a centrifugal nozzle carried by said sleeve comprising a cup having an outer distributing wall and an inner wall forming an annular receiving chamber between said outer and inner walls, a tubular member spaced from said inner wall to form an oil passage way and extending above the same, and a ange extending outwardly from said cup provided with a discharge passage communicating with said oil pas'- sageway.

4. In an oil burner, the combination of a housing, an annular oil pan secured thereto, a stationary vertical conduit within saidhousing, an oil distributing head thereon, a rotatable sleeve surrounding said conduit, a cup-shaped nozzle securedl to said sleeve having an outer wall, an inner wall and an annular baie therebetween, the space between the inner wall and the baille forming a gravity discharge conduit for oil above the level of said bale,'and a' flange secured to said outer wall forming a covering for said housing, said iange being provided with an oil assage connecting with said discharge con uit and said oil pan.

'5. `In an oil burner, an oil head having a portion at its outer edge, a rotary nozzle aving an outer wall and an upwardly extending inner wall at its lower end, a tubular member spaced from said inner wall forming an overflow passage, said outer edge of said oil head projecting below the upper end of said inner wall of lis said nozzle between-said outer and inner" 6.. In an oil burner', the combination with an oil distributing head, of a rotary cup shaped nozzle surroundingsaid head having a vertical outer wall, an outwardly extending wall at the upper end, and an upwardly extending inner wall at the lower end thereof forming an annular recess, a cylindrical sleeve spaced within said inner wall and extending vertically to said oil distributing head, for ming with said, inner wall an annular conduit adapted to convey surplus oil from said nozzle. Y

7 In an o il burner, theA combination with an oil distributing head, of a rotary nozzle surrounding said head having a vertical outer cylindrical wall provided with an annular pocket in the lower end adaptedto prevent the accumulation of an excessive amount of oil, an annular conduit connecting with said annular pocket adapted toconvey surplus oil from said nozzle, and a -flange at the upper end of said nozzle having a wall, a member carried by the lower portion of said nozzle extending con uit in communication with said annular conduit, and a reservoir positioned beneath said downwardly extending conduit, centrifugal force upon the oil'in said annular recess reventingdischarge of oil 'throu h said conlluits durlng rotation of said nozz e.

9. In an oil burner, a rotatable atomizing nozzle and means for supplying oil thereto, said nozzle having an outer wall and at its lower end an inner wall forming an annular recesstlerbetween, a sleeve extending u wardly within said nozzle concentrlca y therewith providing an annular conduit berovided with a downwardly tween said sleeve and said innerwall, said conduit being in communication with Isaid nozzle above said inner wall, a downwardly daring hood carried by the lower portion of. said nozzle provided with a downwardly extending cpnduit in communication with said annular conduit, a reservoir positioned beneath said hood adapted to receive sur lus oil from the nozzle when the latter fai to rotate, the centrifugal force of said rotatable nozzle preventing oil from entering said annular conduit during rotation of the nozzle.

In testimony whereof I ailx my signature.

CHAS. F. WARRICK. 

